Tartrazine, certified, 0.25g

Benzo[a]tetracene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 226-88-0

Metribuzin, 100 µg/ml, Acetonitrile, 5ml

6-Propyl-2-thiouracil, 250mg